[Bug 2134461] [NEW] Noble bootloaders can't netboot xenial images

[Jacopo Rota]

Public bug reported:

Noble bootloaders
(https://images.maas.io/ephemeral-v3/candidate/bootloaders/uefi/arm64/20250715.0/grub2-signed.tar.xz)
can't netboot xenial images
(https://images.maas.io/ephemeral-v3/stable/xenial/arm64/20210928/) on
arm64.

The machine after fetching grub, the kernel and the initrd fails with

Booting under MAAS direction...
loader/efi/linux.c:102:linux: UEFI stub kernel:
loader/efi/linux.c:103:linux: PE/COFF header @ 00000040
loader/efi/linux.c:132:linux: LoadFile2 initrd loading disabled
loader/efi/linux.c:510:linux: kernel file size: 14958592
loader/efi/linux.c:512:linux: kernel numpages: 3652
loader/efi/linux.c:529:linux: kernel @ 0x138e4e000
loader/efi/linux.c:437:linux: Loading initrd
loader/efi/linux.c:456:linux: [addr=0x1368ee000, size=0x255f05b]
kern/efi/fdt.c:32:linux: not found registered FDT
loader/efi/fdt.c:109:linux: allocating 1155 bytes for fdt
loader/efi/linux.c:161:linux: Initrd @ 0x1368ee000-0x138e4d05b
error: cannot load image.

  Failed to boot both default and fallback entries.

Press any key to continue...

All the steps to setup the environment and reproduce the issue can be
found here
https://maas.r00ta.com/development/testing_bootloaders/index.html

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2134461

Title:
  Noble bootloaders can't netboot xenial images

Status in grub2 package in Ubuntu:
  New

Bug description:
  Noble bootloaders
  (https://images.maas.io/ephemeral-v3/candidate/bootloaders/uefi/arm64/20250715.0/grub2-signed.tar.xz)
  can't netboot xenial images
  (https://images.maas.io/ephemeral-v3/stable/xenial/arm64/20210928/) on
  arm64.

  The machine after fetching grub, the kernel and the initrd fails with

  Booting under MAAS direction...
  loader/efi/linux.c:102:linux: UEFI stub kernel:
  loader/efi/linux.c:103:linux: PE/COFF header @ 00000040
  loader/efi/linux.c:132:linux: LoadFile2 initrd loading disabled
  loader/efi/linux.c:510:linux: kernel file size: 14958592
  loader/efi/linux.c:512:linux: kernel numpages: 3652
  loader/efi/linux.c:529:linux: kernel @ 0x138e4e000
  loader/efi/linux.c:437:linux: Loading initrd
  loader/efi/linux.c:456:linux: [addr=0x1368ee000, size=0x255f05b]
  kern/efi/fdt.c:32:linux: not found registered FDT
  loader/efi/fdt.c:109:linux: allocating 1155 bytes for fdt
  loader/efi/linux.c:161:linux: Initrd @ 0x1368ee000-0x138e4d05b
  error: cannot load image.

    Failed to boot both default and fallback entries.

  Press any key to continue...

  All the steps to setup the environment and reproduce the issue can be
  found here
  https://maas.r00ta.com/development/testing_bootloaders/index.html

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